Pumping mechanism



Nov?, 1944. l c. E, BmDwELL 2,361,989

PUMPING MECHANISM Filed Oct. 1:5, 1941 IN VENT OR.

`iref'in which: i l Fig. 1 is a fragmentary, longitudinal. sectional vview of theinver'itioni` l i #View ofthe inventionshowing a'continuance off the 'lstructllllllisbrtdl .F15-1L Patented Nov. 7, 1944 f UNITED STATES* PATENT 'op mi.; L l l vvruMrllyzcswtrfiANlsm l K i i" l ,halon E` Bridwell, Detroit, Mich. i g. n n' u .Y V Lf Application ottenerla1941;serialiNo.4145742l f 5 claims. .(Ci,V 10s-15s)4 invention relates to a new and'useful im` ploven'ient in` a` pumping mechanism adapted for tected against contact. with sand or otheriabrasive or destructive material. l

l A.It is an object of thepre'sentinvention topro- Fig.2.. n l videfa constructionwherebythe,liquid above the [10. Fig. 7 is a sectional view taken on line l-l of travelingvalve is closed ofandprevented from returning to the traveling valve orvalve seat. l

`:Another 'objectA of Ythe invention is the pro- .vision of aconstruction Yin` which the life of then` 15 Fig.. 2.

due to its protection from destructive and wearing .elements.` f

traveling` valve may `be r considerably increased,

,1 Another `object of; the invention is `the `provision 'of anupper standing `valveso constructed andw yarranged that it will be guidednin itsmovements. 2 l-free for rotation,and easily and quickly Aassembledinposition. y l

f Another-objectief theinvention is the provision l.in a pump plunger having a plurality of sealing@25 .i rings Yaround its periphery for `sealing the pump which is a reduced neck 22 having lateral openbarrel. ,Y

.. 'Another object of the invention is theprovision in a pump ofV this type `of` a pump plunger .so` con- .structed -Iand-arranged that a sand trap will befw30 sucker rodsthereto. A Aportion 21 of thislrod provided-intermediateits ends. l i i Another `oblfctxof the` invention is'the nro- .vision of a .pump plungeroperating in a mimo barrel so constructedand arranged that` a closer lFig. sis a centrar 1ongitudina1. fragmentary,

l 'sectional View of the invention showing a, con-- tin'uance of the structure illustratedin Fig. "2.;

Fgl is a sectional view `taken ont` lineflf-fdgnof Fig. 5 is a sectional viewftaken'on line Esi-A5101 Figi y Fig. 2. a A

Fig; 8 is a sectional view taken on line 8-A--8` of Fraz. p .n Fig. 9 is a sectional view taken online 9 9 of In the drawing I have illustratedthe invention as embodying a head valve structure comprising the'tubular portionr Il which iswcut away` on its inner surface for a portion of its length topro-A vide the space I8. This .tubular portion is also provided with the inwardly projecting shoulder l 9 vwhich provides the valve seat surface 2U.: This tubular portion isalso provided with the inwardly projecting shoulder `2| proceeding upwardly from 25 snugly engages as a slide yiitin the bore formed Y inthe head 24 and projecting downwardly from this portion 21 is the end 28 of reduced diameter which carries a valve head 28 and a valve head machined tybetween'the plunger and the barrel-r'35 30. these `valves heads 29 and 30 being slidable becomes unnecessary.

yAnother objectqof the invention .istheprovisiongof a `constructionso arranged that a nunon .barrel will carry `a pullltube nut embracing the into andout of registration `with the bosses or.

30 serve as effective valves for closing the passage Dullftllbeandiin spaced relationtliereto for pro-"14a through the member I1, the inner surface ofthe viding necessary `bleeding'or leakage.`

recognizedfthat various. changes and modificaltions mayibe made in *the detailfofstruoturp i1-an `lustrat'ed withoutidepartingf from the invention 45 the reduced baseportion 3l and the portion 433.

herein set forth and it is intended fthat such l modifications shall be brought within the scope? of the claimsforming a part hereof; i f U *Forming apart' of the specification' is a draw n Fig. 2 is a fragmentary,iongitudinai; eeptipnai shoulders or bosses I9 and 2l serving asvalve seats;

' Carried by the'stem' 28 below the v alvehead'3ll is a cup shaped valveembodyiner the bottom 32.

`Lateral openings 34 are formed .in the cup shaped valve so as to establish communication between the interior thereof and the space I 8l When moved into closing position as shown in`l1'ig 1,

" 50 the outer face of the bottom 32 engages the face 20 and serves vas a valve for closing the passage through the member I'l.` As the rod 25 `is reciprocated relatively to themerrber l 1f andmoved downwardly from the position shown in Fig., .1..

'55 the valve head 32V will moveV out of engagement with its seat while the valve heads 30 and 29 are still in closing position. As this downward movement of the rod 28 continues the valve heads 30 and 29 will move out of registration with the shoulders or bosses I9 and 2| so that the liquid would be permitted to pass from the space I8 upwardly into the interior of the neck 22 from which it may issue through the openings 23. As the rod 28 moves downwardly the nut 26, which may be Yadjusted on the threaded portion 25 to the proper position, will strike the end of the head 24 so that the member I1 will move downwardly in unison with the rod 28. On the reverse stroke the valve heads 29 and 30 will move into closing position before the valve head .32 engages its seat 20, thus the liquid above the valve head 32 is shut off from access to the valve head 32 before it moves into closing position. Experience has shown that in pumping oil, the sand has a tendency to settle and when settling on the valve .32 will -have a tendency to wear away this valve .and its seat. This, -of course, :results in pulling the pump and replacing the valve, an operation which is considerably expensive. 'The valves 29 and 30, serve as valves for protecting the upper traveling valve. When the `valve ,head 3 2 finally engages on said seat 20, further upward movement :of the stein .28 will, of icourse, vmove the member i1 and the stem 28 and its parts :upwardly.

A nipple 35 is threaded onto the end of the .member |.1 and ,serveswas a means for connecting to the member I1 the pump barrel 36 in whichfthe plunger is'slidably mounted. .In the structure illustlra'ted, I have indicated the pump barrel asa being reciprocated with `the yplunger stationary. It is la well-known practice, however, that the plunger may Abe reciprocated and ,the .pump barrel retained stationary, in .which .event .the vvalve heads 29 .and 3D would be used tto protectthe up-s.:

'end being enlarged to provide .an engagement 'head against which engages Athe standing .valve stop-41 which is annular in constructionand provided with a pair of axially directed alims 4 6 .car-

rying a head 45 'through which projects a s ternf"4 "44 `projecting downwardly from the bottom or 'head '43 of a cup shaped valve embodying .the flower reduced portion v4| and the upper portion 40 which slidably engages in a snug fit in the pumpbarrel. Openings 42 are formed lin the re l duced portion 41 so as to establish communica- Ation between theinterior of the valve 4'0 and the anterior of the 4:pump fbarre'l 36. A'fter the stem A44 has Abeeirprojected through the head 45, it is .upset as A'at 49 so as to prevent its Iundue =remova`l.

'Gonnected to the 'lower end yof the member 31 is the upper end of a plunger 50 which is yprovided,intermediateiits ends-with ring grooves in `which sealing rings 52, diagonally Vsplit as shown `indilg. .2, aremounted. By fusing `these rings onA the plunger 50, a line V4machining of the plunger 51),so as -to -form aclose twithfthe inner-surface .offthe pump barrel 36=becomes Aunnecessary and, thus `a more -economicalwconstruction is provided.

Thiscomparatively loose qi'lt between the plunger .50 and `the -pump 'barrel 36 permits the .sand which may have lodged between the -inner .surfaced-f -the pump Abarrel .'36 and the plunger -to precipitate and :enter the .space 5,3 which is ,formed .by reducing `the diameter of :the-plunger 50. The plunger is provided, at its reduced portion, with openings 54 so that the sediment and liquid which may have precipitated into the space 53 may pass into the interior of the plunger which is formed tubular. The sediment and precpitant entering the sand trap or space 53 which enters the interior of the plunger through the openings 54 is thus again returned to the stream of liquid being pumped and agitated so that this abrasive, sedimentary material is thus held in and travels with the liquid. The vremoval of this material from between the plunger and the inner surface of the lbarrel results in less wear on the plunger vand the barrel with consequent increase in life of the Iplunger and the barrel.

As shown in Fig. 3 the plunger 50 is also provided with a lower set of grooves |54 in which sealing rings .55 are provided. Projecting downwardly from the lower end of the plunger 50 is a threaded nipple 56 onto which is threaded the coupling 51 which connects to the-upper end of .the pull tube 58. This pull tube extends thrQugh a bore 6l formed in the pull tube nut 59 which is threaded Aonto the lower end of the pump barrel 3.6. It =will be noted that there is a space 60 `be tween the kpump barrel r36 and the ypull tube 5 8 and that liquid entering this space may b e permitted to drain through jthe space. 6 l

What I claim as new is:

l. In a mechanism of the class described, adapted for use lwith a pump structure, a tubular member mounted on 'the -upper end o f the rpump structure and projecting upwardly therefrom in alignment therewith and' in communication therewith for providing a vconduit for conducting liquid from said pump structure; a ,plurality of valve -seats in said tubular member; a valve slida'bly mounted in said tubular member Aand movable relatively thereto and in unison therewith, below and engageable with Aone of said valve seats, for controlling thev ow of fuid through said tubular member and movable to -open and closed positions; a stem connected to said valve and projecting upwardly therefrom outwardly of the upper end of said 4tubular member; and a valve structure carried by said stem above said valve for cooperating withone of the valvenseats in said tubular member for controlling the lflow of uid through said tubular memberalnd, upon movement of said stem in the direction Vfor ,closing said first-named valve, engageable with its rseat prior to the closing of said iirst-named valve, land upon movement of said 'stem in the opposite direction for opening said first-named ,valve disengageable from its seat subsequent to the opening of said valve.

2. yIn a mechanism of the class described, 4and adapted 'for use on a pump structure, a tubular member mounted on the upper 'end of said structure and projecting upwardly therefrom in alignment therewith fand in lcommunication therewith; a valve slidably 'mounted infs'aid tubular member and movable relatively thereto and -in unison therewith for controlling the'flow of 'fluid therethrough and movable to open -andl closed positions; a Stem connected to said-Valve and'projecting outwardly vbeyondv the fupper end of rrsaid tubular member and slidable therein for moving said valve to Vopen vand closed position; Aand a plurality of spaced apart means cooperating with said stem and-said tubular member for guiding said stem and said valve in itsfslidablemovements relatively to said tubular-member.

3. In a mechanism rof `the Class described, adapted for useiWith apump-'structureincluding a reciprocating barrel and stationary plunger, a tubular member mounted on the upper end of said barrel andprojecting upwardly therefrom in alignment therewith and in communication therewith for providing a conduit for conducting iiuid upwardly through said barrel; a valve slidably mounted in said tubular member and movable relatively to said barrel and in unison therewith and movable to open and closed position for controlling the flow of uid through said tubular member; a plurality of Valve seats formed on the inside of said tubular member above said Valve; a plurality of valve heads engageable with said plurality of va1ve seats; and means connected to said valve and said va1ve heads and projecting beyond the upper end of said tubular member for moving said valve and valve heads relatively to their seats, said va1ve heads upon movement to closed position, being movable into engagement with their seats prior to the engagement of said va1ve with its seat.

4. In a mechanism of the class described adapted for use on a pump structure embodying a reciprocating tubular member, a tubular fitting A secured to the upper end of said tubular member and projecting upwardly therefrom and in alignment therewith and in communication therewith; a valve seat-forming member in said iitting and projecting inwardly from the inner surface thereof; a valve slidably mounted in said iitting and positioned below said seat and movable upwardly into engagement with said seat for controlling the iiow of fluid through said fitting; a, plurality of slide valve seats in said fitting in spaced relation to each other and positioned above saidrstnamed valve seat; a stem connected to said valve and projecting outwardly beyond the upper end of said tting `and slidable therein for moving said valve to opened and closed positions; and a plurality of valve heads on said stem in spaced relation to each other for simultaneously engaging said slide valve seats for controlling the ilow of iiuid through said fitting, the bearing surfaces of saidvalve heads and said slide valve seats being sufficiently large for retaining said valve heads in engagement with said slide valve seats subsequent to the opening of said first-named valve and prior to the closing of said first-named va1ve.

-5. In a mechanism of the class described adapted for use on a pump structure embodying a reciprocating tubular member, a tubular tting secured to the upper end of said tubular member and projecting upwardly therefrom and in alignment therewith and in communication therewith; a valve seat-forming member in said iittingand projecting inwardly from the inner surface thereof a valve slidably mounted in said iitting and positioned below said seat and movable upwardly into engagement with said seat for-controlling the flow of fluid through said iitting; a plurality of slide valve seats in said fitting in spaced relation to each other and positioned above said rstnamed valve seat; a stem connected to said valve and projecting outwardly beyond the upper end of said fitting and slidable therein for moving said valve to opened and closed positions; and a plurality of valve heads on said stem in spaced relation to each other'for simultaneously engaging said slide valve seats for controlling the flow of fluid .through said tting, the bearing surfaces of said valve heads and said slide valve seats being sufficiently large for retaining said valve heads in engagement with said slide valve seats subsequent to the opening of said first-named valve and prior to the closing of said first-named valve, the diameter of said iitting being suiiiciently small at a portion of its length for engaging said iirst-named valve and serving as a guide therefor and the diameter of said tting above said valve heads being suiiiciently small for engaging said stem as a guide, f

CHALON E. BRIDWELL. 

